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Analyze » City of Aurora, IL » CIT1765598574

Incident Score: Analysis & Impact (CIT1765598574)

The details regarding individual company incidents & reports gives you full view from every side.

Rankiteo Score Impact Analysis

Rankiteo Incident Impact-128
Company Score Before Incident762 / 1000
Company Score After Incident634 / 1000
Company LinkView City of Aurora, IL Profile
INCIDENT NUMBERCIT1765598574
Type of Cyber IncidentRansomware
ATTACK VECTORPhishing, Exploitation of unpatched vulnerabilities
DATA EXPOSEDTrue
INCIDENT DATE20/03/2025
STATUSOngoing

Key Highlights From The Incident Analysis

  • Timeline of City of Aurora, IL's Ransomware and lateral movement inside company's environment.
  • Overview of affected data sets, including SSNs and PHI, and why they materially increase incident severity.
  • How Rankiteo’s incident engine converts technical details into a normalized incident score.
  • How this cyber incident impacts City of Aurora, IL Rankiteo cyber scoring and cyber rating.
  • Rankiteo’s MITRE ATT&CK correlation analysis for this incident, with associated confidence level.

Full Incident Analysis Transcript

In this Rankiteo incident briefing, we review the City of Aurora, IL breach identified under incident ID CIT1765598574.

The analysis begins with a detailed overview of City of Aurora, IL's information like the linkedin page: https://www.linkedin.com/company/city-of-aurora_2, the number of followers: 6951, the industry type: Government Administration and the number of employees: 401 employees

After the initial compromise, the video explains how Rankiteo's incident engine converts technical details into a normalized incident score. The incident score before the incident was 762 and after the incident was 634 with a difference of -128 which is could be a good indicator of the severity and impact of the incident.

In the next step of the video, we will analyze in more details the incident and the impact it had on City of Aurora, IL and their customers.

Aurora City recently reported "Medusa Ransomware Gang Compromises Over 300 Critical Infrastructure Organizations", a noteworthy cybersecurity incident.

U.S.

The disruption is felt across the environment, affecting Critical infrastructure systems, Virtual machines and Backup services, and exposing True.

In response, moved swiftly to contain the threat with measures like Network segmentation and Blocking connections from unknown IP addresses, and began remediation that includes Patching vulnerabilities, Implementing MFA and Enforcing NIST password standards, while recovery efforts such as Maintaining offline backups and Encrypting data continue.

The case underscores how Ongoing, teams are taking away lessons such as Critical infrastructure remains a prime target for ransomware gangs due to its essential role and potential for widespread disruption. Proactive security measures, including AI-driven automation and network segmentation, are essential to mitigate such threats, and recommending next steps like Patch operating system, software, and firmware vulnerabilities promptly, Implement network segmentation to limit lateral movement and Block connections from unknown IP addresses and regions, with advisories going out to stakeholders covering The FBI, CISA, and MS-ISAC have issued mitigations to prevent Medusa ransomware attacks, emphasizing the importance of proactive security measures for critical infrastructure organizations.

Finally, we try to match the incident with the MITRE ATT&CK framework to see if there is any correlation between the incident and the MITRE ATT&CK framework.

The MITRE ATT&CK framework is a knowledge base of techniques and sub-techniques that are used to describe the tactics and procedures of cyber adversaries. It is a powerful tool for understanding the threat landscape and for developing effective defense strategies.

MITRE ATT&CK® Correlation Analysis

Rankiteo's analysis has identified several MITRE ATT&CK tactics and techniques associated with this incident, each with varying levels of confidence based on available evidence. Under the Initial Access tactic, the analysis identified Phishing (T1566) with high confidence (95%), supported by evidence indicating phishing campaigns as initial access method and Exploit Public-Facing Application (T1190) with high confidence (95%), supported by evidence indicating exploitation of unpatched vulnerabilities including CVE-2024-1709, CVE-2023-48788. Under the Execution tactic, the analysis identified Command and Scripting Interpreter (T1059) with moderate to high confidence (80%), supported by evidence indicating psExec used for lateral movement and User Execution: Malicious File (T1204.002) with moderate to high confidence (70%), supported by evidence indicating phishing campaigns likely involve malicious attachments/links. Under the Persistence tactic, the analysis identified Valid Accounts (T1078) with moderate to high confidence (80%), supported by evidence indicating rDP and remote access tools (AnyDesk, Atera, Splashtop) used for access. Under the Privilege Escalation tactic, the analysis identified Exploitation for Privilege Escalation (T1068) with moderate to high confidence (70%), supported by evidence indicating exploitation of CVE-2024-1709 (ScreenConnect) and CVE-2023-48788 (Fortinet EMS). Under the Defense Evasion tactic, the analysis identified Impair Defenses: Disable or Modify Tools (T1562.001) with high confidence (90%), supported by evidence indicating disabling security software, terminating backups, and deleting shadow copies and Indicator Removal: File Deletion (T1070.004) with moderate to high confidence (80%), supported by evidence indicating deleting shadow copies to hinder recovery. Under the Credential Access tactic, the analysis identified Brute Force (T1110) with moderate confidence (60%), supported by evidence indicating rDP usage implies potential credential brute-forcing. Under the Discovery tactic, the analysis identified Account Discovery (T1087) with moderate to high confidence (70%), supported by evidence indicating review domain controllers and active directories for unknown accounts and File and Directory Discovery (T1083) with moderate to high confidence (80%), supported by evidence indicating ransomware encrypts files, implying prior discovery. Under the Lateral Movement tactic, the analysis identified Remote Services: Remote Desktop Protocol (T1021.001) with high confidence (90%), supported by evidence indicating rDP used for lateral movement, Remote Services: SMB/Windows Admin Shares (T1021.002) with moderate to high confidence (80%), supported by evidence indicating psExec used for lateral movement, and Remote Access Software (T1219) with high confidence (90%), supported by evidence indicating anyDesk, Atera, Splashtop used for remote access. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating data exfiltration and sensitive information compromised. Under the Command and Control tactic, the analysis identified Remote Access Software (T1219) with high confidence (90%), supported by evidence indicating anyDesk, Atera, Splashtop used for C2 and Ingress Tool Transfer (T1105) with moderate to high confidence (70%), supported by evidence indicating tools like Rclone and gaze.exe deployed post-compromise. Under the Exfiltration tactic, the analysis identified Exfiltration Over Web Service: Exfiltration to Cloud Storage (T1567.002) with moderate to high confidence (80%), supported by evidence indicating rclone used for data exfiltration and Exfiltration Over C2 Channel (T1041) with moderate to high confidence (70%), supported by evidence indicating data exfiltrated via remote access tools. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with high confidence (100%), supported by evidence indicating aES-256 encryption with .medusa extension, ransom note left, Inhibit System Recovery (T1490) with high confidence (90%), supported by evidence indicating deleting shadow copies to hinder recovery, and Data Manipulation: Transmitted Data Manipulation (T1565.002) with moderate confidence (60%), supported by evidence indicating threat of public data leaks and auctions. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.

Sources & References